Cheapest return flights from Ontario to Las Vegas in December from 66€

AirHint found the following cheapest return flights from Ontario (ONT) to Las Vegas (LAS) in December 2025 (see full year).

Return flights

16 Dec - 17 Dec Southwest Airlines direct
09 Dec - 11 Dec Southwest Airlines direct
06 Dec - 09 Dec Southwest Airlines direct
05 Dec - 07 Dec Frontier Airlines direct
02 Dec - 05 Dec Southwest Airlines direct
12 Dec - 16 Dec Southwest Airlines direct
05 Dec - 10 Dec Southwest Airlines direct
05 Dec - 08 Dec Southwest Airlines direct
01 Dec - 09 Dec Southwest Airlines
01 Dec - 04 Dec Southwest Airlines
30 Dec - 06 Jan Southwest Airlines
23 Dec - 09 Jan Southwest Airlines
31 Dec - 01 Jan Frontier Airlines direct
31 Dec - 02 Jan Frontier Airlines direct
30 Dec - 02 Jan Frontier Airlines direct
30 Dec - 01 Jan Frontier Airlines direct
25 Dec - 01 Jan Southwest Airlines
01 Dec - 01 Jan Southwest Airlines
29 Dec - 01 Jan Southwest Airlines
26 Dec - 02 Jan Southwest Airlines

Also check the deals for one-way flights from Ontario to Las Vegas in December.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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